Determine the energy stored in C1 when C1 = 10 ?F, C2 = 12 ?F, C3 = 15 ?F, and V0 = 70 V
a.
6.5 mJ
b.
5.1 mJ
c.
3.9 mJ
d.
8.0 mJ
e.
9.8 mJ
c
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Molecular Speeds: (a) At what Celsius temperature is the average kinetic energy of a helium gas atom equal to 6.21 × 10-21 J? The Boltzmann constant is 1.38 × 10-23 J/K .(b) What would be the temperature for radon gas?
Fill in the blank(s) with the appropriate word(s).
The half-angle of the conical shock wave produced by a supersonic aircraft is 60°. What is the ratio of the speed of the aircraft to the speed of sound?
A) 2.0 B) 1.7 C) 0.87 D) 1.2
A walker starts at the origin at 1:00 PM and walks 3.0 km from the origin toward the WEST to point A. She arrives at point A at 2:30 PM. She then walks from point A 2.0 km toward the WEST to point B and arrives at point B at 3:45 PM. The walker's average velocity for the entire trip is
A. 1.8 km/hr toward the EAST. B. 1.8 km/hr toward the WEST. C. 1.3 km/hr toward the WEST. D. 1.3 km/hr toward the EAST. E. 0.36 km/hr toward the WEST.
Interstellar dust consists mostly of
A) microscopic particles of carbon and silicon. B) ozone "smog." C) hydrogen and helium atoms. D) tiny grains of water ice. E) the same tiny particles found in household dust.